OCP-V13-040

QUESTION 40
Evaluate the following code:
SQL>VARIABLE task_name VARCHAR2(255); SQL>VARIABLE sql_stmt VARCHAR2(4000);
SQL>BEGIN :sql_stmt := ‘SELECT COUNT(*) FROM customers
WHERE cust_state_province =”CA”’;
:task_name := ‘MY_QUICKTUNE_TASK’;
DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,
:task_name, :sql_stmt);
END;
What is the outcome of this block of code?
A. It creates a task and workload, and executes the task.
B. It creates a task and workload but does not execute the task.
C. It produces an error because a template has not been created.
D. It produces an error because the SQL Tuning Set has not been created.
Correct Answer: A

执行下面的代码
SQL>VARIABLE task_name VARCHAR2(255); SQL>VARIABLE sql_stmt VARCHAR2(4000);
SQL>BEGIN :sql_stmt := ‘SELECT COUNT(*) FROM customers
WHERE cust_state_province =”CA”’;
:task_name := ‘MY_QUICKTUNE_TASK’;
DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,
:task_name, :sql_stmt);
END;
结果是什么

A.它创建一个任务和工作量，并执行任务。